05034: tshingen : video turns into GFX coruption garbage loop that never ends unless you quit or reset

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
05034	Gameplay	Critical (emulation)	Random	Oct 10, 2012, 03:55	Jul 5, 2016, 00:25

Tester	B2K24	View Status	Public	Platform	MAME (Self-compiled)
Assigned To	Kale	Resolution	Fixed	OS
Status [?]	Resolved			Driver	jaleco/megasys1.cpp
Version	0.147u1	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	05034: tshingen : video turns into GFX coruption garbage loop that never ends unless you quit or reset
Description	Playing through this game on 0.147u1 X64 self compile I notice at random the emulation stops and you enter some "GFX garbage loop" that never ends. It happened too me on stage 1 and then another game on stage 5. The Reproducibility of this seems to be always 100% except you can't trigger it exactly when you want, you have to keep playing and eventually it randomly happens. When in this"GFX garbage loop" state, MAME is completely functional as if nothing is wrong.
Steps To Reproduce	load tshingen, play, and eventually you will get caught in what I call "GFX garbage loop" unfortunately it might take 30 minutes or even 1 hour, but it will eventually happen.
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	tshingen

Attached Files	tshingen.zip (718,875 bytes) Oct 10, 2012, 03:55 Uploaded by B2K24 [0.147u1] save state, recorded movie and snaps.
	0001.png (1,449 bytes) Oct 10, 2012, 04:07 Uploaded by B2K24
	0002.png (1,487 bytes) Oct 10, 2012, 04:07 Uploaded by B2K24
	0003.png (3,832 bytes) Oct 10, 2012, 04:07 Uploaded by B2K24

No.10361 Solstar Tester Mar 15, 2014, 00:20	tried it with mameui64 0.152 on a windows 7 x64 machine.never played the game before so i don't know if it worked with earlier versions,but after finishing the second stage,the game will crash,going back to what it seems its test mode(with all tiles scrolling diagonally),and the sound stuck on a loop,exactly as described here tried again with the japanese version,and wasn't able to recreate the same issue...it seems to happen at random points,in random moments
No.10362 NekoEd Senior Tester Mar 15, 2014, 23:09	It does indeed look like a rug test, it's possible the game is crashing, resetting itself then failing the test, which would explain why it doesn't end (some games will continue running the test until it passes.)
No.11400 haynor666 Tester Jan 25, 2015, 13:15	Similiar behaviour is in Ninja Kazan (which is not working game in fact).
No.12884 B2K24 Senior Tester Jul 3, 2016, 08:48	Did an one hour play though the entire game and reached the end. I didn't encounter this behavior for 60 minutes from start to finish.
No.12899 M.A.S.H. Senior Tester Jul 5, 2016, 00:25	Set 'Fixed in Version' from 0.176GIT to unknown.